Calculating-machine.



Brooklyn,

UNITED STATES 'JACOB SULEDER, OF BROOKLYN, NEW YORK, ASSIGNCR TO THE KEU'FFEL 8c ESSER PATENT OFFICE.

i CIVIPANY, 0F HOBOKEN, NEW JERSEY,l A CORPORATION 0F NEW JERSEY..

To all whom it may concern:

Be it known that I, J Aeo'SnLnnnn, a citizen of: the United States, and resident of in the county et Kings and State of New York, have invented certain new and usetul Improvements in Calculatinglvlaehines, of-Which the following is a specitication, i

This invention relates to calculating machines and its novelty consists in the construction and adaptation ot the parts as will be more fully hereinafter pointed out.

There has lone' been upon the market a class of calculatingl machines adapted tor use in performing the operations or" addi tion, subtraction, multiplication and division, a machine of such class formingr the subject mattei' ot United States Letters Patent to Alexander' llechnitzer, No. 809,075, dated January 9J, 1906 and another Yforming,` Ithe subject matter of French patent to Thomas No. 138,912, dated September 29, 1880, in which the upper easing;` of the machine is provided with a series of slots alongside of which are displayed numerals in denominational series and in which slots buttons are adapted to slide and which buttons are. connected by appropriate means with the. calculating,` mechanism so that when the buttons are adjusted opposite the proper numerals the items so set up are used in performing the operations of arithmetic above indicated. The machine is also supplied with a series of numeral wheels upon the peripheries ot' which numbers are displayed in such a manner that as the wheels are rotated in the performance ot the calculations mentioned, these numbers appear in turn beneath al series of sight apertures in a tiltable section ot the upper easing ot the machine, the series of numbers in sight in such apertures constituting at. any time the result of the numerical calculation undertaken. Commonly this machine is used in performing single operations ot addition, subtraction, multiplication or division and the numeral Wheels referred to registering Specification of Letters Patent. Application filed April 2, 1910. vSerial No. 553,102.

f tend to do so, and thus the result are returned to zero by means of a caneelingbar manually operated slidable in suitable bearings in the side of the ma chine and actuated from a handle projecting through its upper casing, and it is customary for the operator after pertorniing a numerical calculation, for instance, that of multiplication, and after reading the result from the figures in sight in the line ot apertures above referred to, to restore all of the numeral Wheels to zero by pushing the handie connected to the canceling' bar to the left. New it sometimes happens that successive operations are desired to be performed with the machine and the results of such successive operations are required to be added together. In such case it is obvious that it is not desirable to malte use of the canceling,` bar to restore the numeral wheels to yAero until. the entire series of operations is concluded, but such is the effect et muscular mechanical memory that the operator unconsciously and inadvertently frequently moves the canceling bar in the midst of such a series of operations, when he does not inloses'the result `Which he is seeking; to obtain and is compelled to perform the operations over again.

The purpose ot this invention is to provide means by which this accidental, or inadvertent movement, of the canceling bar handle is prevented and it comprises a manually operated locking member which can be moved by the operator into the path et the cancelino` bar handle before a series of operations, the results of which are to be accumulated, are commenced, and he is thus prevented from accidentally destroying' the results of the calculations upon which he is,

engaged. W

Inhthe drawings, Figure l is a top plan View of a machine embodying the invention, Fig. 2 is a` transverse section and" iartial side elevation on an enlarged scale o' a ortion of the mechanism on the plane of tie line .QH-2 in Fig. 8, Fig. S is a rear elevation of the left end of the tiltable plate, Fig.

Patented. N0v.15,1e1o. l

esv

is a top plan vievv of the lett end of such plate showing the safety loch engaged with the cancelingbar handle, Fig. is a perspective ot the safety locltnnd Fig. 6 is a perspective dcta'l of the cancelingbar handle and its connections.

ln the drawings. 10 is the upper fixed plate oi the calculating machine, and 2O is the upper tiltable plate of the same.

11, 11 are slots in the plate 10, and alongside of which are displayed the numerals in series.

13, 13 are buttons sliding in said slots and designed for use in enun'lerating one series oi items used in the calculations. y

141-, l-l are sight openings 1n the plate l0 through which numbers 15, 15 displayed on numeral Wheels beneath the openings may be seen.

1G ,is the actuating handle for the series of such numeral Wheels.

1T is the handle of a restoring bar, the purpose and function of which is explained in Letters l?atent of the United States iss ad July 7th, 1908 to Tobias Bauerle.

21, 21 are sight openings in the plate 20 and through them can be seen numbers 22,

v 22 displayed on numeral Wheels 23 arranged beneath such openings.

24, 24 are also sight openings in this same plate and 25, 25 are numerals displayed on such numeral Wheels 23 and visible through the sight openings 2li.

is the handle of a restoring or canceling bar 31 Which is provided With notches 32 adapted to engage cam teeth 33 secured to the rear side of each Wheel.

ldfithout describine this mechanism in detail, it is suflicient for the purposes ot' this description to say that When the bar 31 is moved toward the left hy the handle' 30 the notches 32 engage these cams 33 and move the Wheels all in the same direction and until each one of them is so positioned that the Zero displayed' on it is seen through one of the sight openings 24. The canceling bar is automatically retracted to its original position by means of a spring 34.

None oi the parts so far described. comprise the invention herein claimed.

The handle 30 moves in a slot t0 in the plate 20. Arranged at a convenient place on the plate 2O is a screw 41 having' a slit head 42. Beneath the head and in sliding contact with the plate 20 is a locking plate 43 having an upturned flange Lia serving a handle or finger piece, and a slot 45 to engage the screw stl. lt also has a recess d6 to engage and hold the handle 30.

Vtlhen the locking plate li3 is in the position shown in Figs. l and 2 and the screw l is turned down to hold the plate against the plate 20, it is obvious that the canceling bar handle 30 is in no way interfered ardesiwith. While it the screw 41 is loosened sufciently to allow the plate a3 to be slid ton ward into the position shovvn in dotted outline in Fig. 1, it is evident that the canceling bar handle can not be moved to the lett beyond the edge Ll? ot' the plate 43 and,

as this movement is not suilicient to allow the canceling bar 31 to restore the numeral Wheels to zero, it is also evident that When so positioned, the plate will prevent any accidental cancellation or" the number accumulated on these numeral Wheels While it will not otherwise interfere with the operation oli the machine. lilfhen the calculation is finished and it is desired to return the Wheels to zero, the plate a3 is moved to its former position by the flange 44;.

lt may at times be desirable to prevent any actuation of the numeral Wheel series for instance, while the machine is beingr moved. ln such case the plate 13 is moved forward and the canceling bar handle 30 is held. until it can-engage with the recess as shown in Fig. el, and thereafter the canceling bar handle and the bar itself can not be moved until the plate i3 is moved.

l. ln a machine of the character'described, an upper plate provided with sight apertures, numeral Wheels in series arranged beneath the same, a bar adapted to simultaneously move all the Wheels to register zero through the sight openings, means comprising a handle for manually moving the bar7 and means for locking the handle to hold all the Wheels at zero, the same means serving to prevent the handle being moved from a zero setting position.

2. ln a machine ot the character described, the combination with a canceling bar and its handle ot' a manually movable plate adapted to be interposed to prevent its movement to a certain position: and which plate is provided with means to lock the handle at such position if it is moved thereto.

3. ln a machine of the character described, the combination with a canceling' bar and its handle of a manually movable plate adapted to be interposed to prevent its movement to a certain position compris ing a sliding plate having a linger piece and set screw.

4t. In a machine of the character described, the combination with a canceling ar and its handle of a manually movable plate adapted to be interposed to prevent its movement to a certain position and which plate is provided with means to lock the handle at sach position it it is moved thereto comprising a plate provided with a recess.

ln a machine ol the character described, the combination with a canceling bai: and its handle of :1 manually movable l the recess embracing the handle tio hold it plate adapted to be interposed to prevent in position. -1 its movement to a Certain position and "itnes` my hand this 21st day of March, ivlnoli plate is provided with means to lock 1910, at New York, N. Y.

the bundle it such position if it is moved JACOB SULEDER. thereto comprising n plate provided with YWitnesses:

n racers, the edge oi the plate contacting Jo111\` A. FINCK,

with the handle to limit its movement and FRED. JUNKER. 

